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Liu, S., Ireys, H, White, J., & Black, W. (2004). Enrollment patterns and medical expenditures for Medicaid Buy-In participants in five states. Washington, DC: Mathematica Policy Research, Inc.
Abstract
The Center for Medicare and Medicaid Services initiated this study to examine selected policy questions related to participation in the Medicaid Buy-In program and to assess the feasibility of using federal databases as sources to answer these questions. The study used 2001 data for California, Iowa, Massachusetts, Minnesota, and Wisconsin.
The study addressed the questions of how many individuals were enrolled in the Buy-In program in 2001, how long they were enrolled, their demographic characteristics and disabilities; the percentage of dual enrollees in both Medicaid and Medicare; per-person medical expenditure; and the effect of structural features in each state's program on enrollment patterns and medical expenditures.
The study found that, before entering the Buy-In program, most participants were already enrolled in Medicaid, and few had private insurance. Most participants had multiple chronic conditions. Prescription drugs were the single most expensive Medicaid service. There was wide variation between states in the proportion of medical expenditures used for PAS, with California spending a proportionately large amount. The study attributes this to the state's multiple funding mechanisms for PAS and its extension of PAS services to the workplace.
The study also found that federal Medicaid and Medicare databases could be used to generate an integrated database that yielded descriptive information about Buy-In participation.
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